regfiletype − Identify the formats of Regina data files
regfiletype file ...
Between Regina versions 2.4 and 3.0, the data files changed from using an impenetrable and undocumented binary format to using (optionally compressed) XML.
This utility simply determines which of these formats a given Regina data file is in.
Multiple files may be given on the command-line; the details of each file format will be written to standard output.
regconvert, regina-kde.
Regina was written by Ben Burton <bab AT debian DOT org> with help from others; see the documentation for full details.